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01.03.2021 •
Physics
A simplified model of a bungee jump can be analyzed in two sections: a freefall section in which the bungee cord has not yet begun stretching and a section in the lower portion of the jump in which the bungee cord stretches and exerts a force on the jumper. The cord is assumed to exert zero force on the jumper until its length exceeds its maximum unstretched length. Determine the maximum unstretched length of a bungee cord of spring constant 100 N/m such that a 70-kg jumper will not hit the ground when jumping from a height of 45 m.
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Ответ:
Explanation:
m = Mass of person = 70 kg
k = Spring constant = 100 N/m
h = Total length of the bungee cord = 45 m
The energy balance of the system is
Maximum unstretched length would be
.
Ответ:
Speed is 25 meters a second
Explanation:
150/25=6